# File lib/facter/util/dhcp_servers.rb, line 37
  def self.network_manager_state
    # If the version is >= 0.9.9, use g instead of nm
    if is_newer_nmcli?
      output = Facter::Core::Execution.exec('nmcli -t -f STATE g 2>/dev/null')
    else
      output = Facter::Core::Execution.exec('nmcli -t -f STATE nm 2>/dev/null')
    end
    return nil unless output
    output.strip
  end